I've just written a WeatherCat to MQTT bridge using the excellent WeatherCat Applescript interface.

MQTT allows lightweight publish and subscribe functionality and is used for process control, Arduino projects and lots of other fun things. The bridge I've written uses the open source MQTT tool Mosquitto

I haven't upgraded my Mac Mini to 10.7 yet. I haven't looked for a few months but originally there were quite a few problems with the USB-to-Serial drivers for the Weather Station. This in itself put a stop to the desire to upgrade.
I'll give it a crack soon though (or maybe jump straight to Mountain Lion!).

It's not just the tides for Merewether but its the tides for Newcastle (which, lets face it, is pretty close). So you could use it for Stockton, Nobbys, Newcastle Beach, Bar Beach / Cooks Hill, Dixon Park Beach, etc.

The Merewether Tides are generated using data massaged from the brilliant program XTide

yup, they are a lot of fun. When I was a kid I worked all smeumr to buy one of those weather kits from Edmund Science. My dad and I mounted it up on the roof and ran the wires down to my bedroom. I spent many hours learning how to forcast weather. Now with computers and 1 wire weather tech my weather hobby has hit a new high. Anyway I can't wait to see your weather site and maybe nfo's as well. It would be cool to set up a werather net between us three.